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ST3243 数据表(PDF) 7 Page - STMicroelectronics

部件名 ST3243
功能描述  3 to 5.5V, 400Kbps, RS-232 Transceiver with auto-powerdown
PDF  20 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

ST3243 数据表(HTML) 7 Page - STMicroelectronics

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ST3243
Electrical characteristics
7/20
Table 6.
Auto-powerdown electrical characteristics
(C1 - C4 = 0.1µF, VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified.
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
VRITE
Receiver input threshold to
transmitter enabled
Positive threshold
Negative threshold
2.7
2.7
V
V
VRITD
Receiver input threshold to
transmitter disabled
1
µA Supply Current
-0.3
0.3
V
VIOL
INVALID Output voltage LOW
0.4
V
VIOH
INVALID Output voltage HIGH
VCC-0.6
V
tWU
Receiver threshold to
transmitter enabled
IOUT = 1.6mA
250
ms
tinvh
Receiver positive or negative
threshold to INVALID HIGH
IOUT = -1mA
1
ms
tinvL
Receiver positive or negative
threshold to INVALID LOW
30
ms
Table 7.
Transmitter electrical characteristics
(C1 - C4 = 0.1µF, VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified.
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
VTOUT
Output voltage swing
All transmitter outputs are loaded with
3K
Ω to GND
± 5
± 5.4
V
ROUT
Output Resistance
VCC = V+ = V- = 0V, VOUT = ± 2V
300
10M
Ω
ISC
Output short circuit current
± 35
± 60
mA
VOT
Transmitter output voltage
T1IN = T2IN = GND, T3IN = VCC
T3OUT loaded with 3K
Ω to GND
T1OUT and T2OUT loaded with 2.5mA
each
± 5V
Table 8.
Receiver electrical characteristics
(C1 - C4 = 0.1µF, VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified.
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
VRIN
Receiver input voltage
operating range
-25
25
V
VRIL
RS-232 Input threshold low
TA = 25°C, VCC = 3.3V
TA = 25°C, VCC = 5.0V
0.6
0.8
1.2
1.2
V
VRIH
RS-232 Input threshold high
TA = 25°C, VCC = 3.3V
TA = 25°C, VCC = 5.0V
1.5
1.8
2.4
2.4
V
VRIHYS
Input hysteresis
0.5
V
RRIN
Input resistance
TA = 25°C
3
5
7
K
Ω



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